diff options
| author | Tom G. Christensen <tgc@statsbiblioteket.dk> | 2015-02-04 08:23:16 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2015-02-04 18:45:31 (GMT) |
| commit | bd4e8822da3bf6ce28a0c5f7c1bbf1b6341c0586 (patch) | |
| tree | 79f4862187a7b453697eeb583b25be9d6d673f01 /ewah | |
| parent | b5007211b6582fc38647ff695b5ac51541ea9de8 (diff) | |
| download | git-bd4e8822da3bf6ce28a0c5f7c1bbf1b6341c0586.zip git-bd4e8822da3bf6ce28a0c5f7c1bbf1b6341c0586.tar.gz git-bd4e8822da3bf6ce28a0c5f7c1bbf1b6341c0586.tar.bz2 | |
ewah: fix building with gcc < 3.4.0
The __builtin_ctzll function was added in gcc 3.4.0.
This extends the check for gcc so that use of __builtin_ctzll is only
enabled if gcc >= 3.4.0.
Signed-off-by: Tom G. Christensen <tgc@statsbiblioteket.dk>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'ewah')
| -rw-r--r-- | ewah/ewok.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ewah/ewok.h b/ewah/ewok.h index 43adeb5..4b95847 100644 --- a/ewah/ewok.h +++ b/ewah/ewok.h @@ -47,7 +47,8 @@ static inline uint32_t ewah_bit_popcount64(uint64_t x) return (x * 0x0101010101010101ULL) >> 56; } -#ifdef __GNUC__ +/* __builtin_ctzll was not available until 3.4.0 */ +#if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR > 3)) #define ewah_bit_ctz64(x) __builtin_ctzll(x) #else static inline int ewah_bit_ctz64(uint64_t x) |